Joi Schema

If you need more advanced schema validation gstore-node support Joi types and validator for your properties. Joi is a powerful schema description language with a great API to validate your fields. It it specially useful for complex embedded entities validation or if you need more precision on your validation.

Important: if you decide to use Joi, you have to use it for all your properties. You cannot mix joi and gstore types and validation.

Install

First make sure you have Joi installed

  npm install joi --save
  # or
  yarn add joi

You can define a Joi type and validator by setting a joi setting on your schema property and set the Schema joi option to true.

const { Schema } = gstore;
const Joi = require('joi');

const userSchema = new Schema({
    name: { joi: Joi.string().required() },
    email: { joi: Joi.string().email() },
}, {
    joi: true, // don't forget to add this setting in the Schema options
});

Joi types can replace all the following settings of a property:

• type

• validate

• default

• values

• required

But you still need to configure the following settings

• excludeFromIndexes

• read

• write

const schema = new Schema({
    password: { joi: Joi.string().required(), read: false },
    createdAt: { joi: Joi.date().default(Date.now), write: false },
    longText: { joi: Joi.string(), excludeFromIndexes: true },
}, { joi: true });

Advanced

If you need even more control over the schema validation you can define an extra **setting for joi. This will be applied on the complete Joi Schema object type.

const schema = new Schema({
    username: { joi: Joi.string().alphanum().min(3).max(30).required() },
    password: { joi: Joi.string().regex(/^[a-zA-Z0-9]{3,30}$/) },
    access_token: { joi: [Joi.string(), Joi.number()] },
    birthyear: { joi: Joi.number().integer().min(1900).max(2013) },
    email: { joi: Joi.string().email() },
}, {
    joi: {
        extra: {
            with: ['username', 'birthyear'], // if username present, birthyear must be too
            without: ['password', 'access_token'], // if password present, access_token cannot
        },
    },
});

Options

The validate() method in Joi accepts an options object. You can pass it in the Schema options.

const schema = new Schema({
    username: { joi: Joi.string().alphanum().min(3).max(30).required() },
    email: { joi: Joi.string().email() },
}, {
    joi: {
        options: {
            abortEarly: false,
            allowUnknown: true,
        },
    },
});